Influence of Truss Topology on Reliability Index

Mochocki, Wojciech; Obara, Paulina; Turant, J.

doi:10.1088/1757-899x/471/5/052061

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Repeat steps ( 3) and ( 4) N times to obtain the stress matrix A of N strength analysis Step 6: Calculate the reliability index of each element by Python. In the reliability model of the finite element, the stress-strength limit state function Z i of the beam element in the derrick (element number is i, 0 < i ≤ M) is shown in Equation (10); see [17][18][19][20]. The safety margin Z i is a random variable, and it depends on the random variable of R (yield strength) and S i (stress of i-th element).…”

Section: Reliability Modeling Under Complex Loadmentioning

confidence: 99%

Influence of Complex Load on the Strength and Reliability of Offshore Derrick by Using APDL and Python

et al. 2022

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In an offshore operational environment, complex loads such as the hook load, stand load and wind load play a crucial role in the structural strength and reliability of the offshore derrick. Previous studies have mainly focused on the effect of a specific load on the strength of the derrick by using commercial software. Therefore, the influencing mechanism of each complex load on the strength and reliability of the offshore derrick is urgently necessary to explore. Not only is the strength numerical model of the JJ315/45-K typical derrick established and conducted via APDL (ANSYS Parametric Design Language), but also the stress–strength reliability simulation is explored and plotted using Python code and APDL. Furthermore, the influence and contribution of each load to the strength and reliability is determined. With the increase in hook load, the positions of maximum reliability risk appear in section II-1. With the increase in stand load or back wind load, the positions of maximum reliability risk appear in the bottom section. In addition, with the decrease in the columns’ height, the stress proportion of the hook load decreases by 73.5%, the stress proportion of the stand load increases by 22.6%, and the stress proportion of the back wind load changes slightly. When the wind speed is less than 20 m/s, the hook load mainly affects the minimum reliability index of the derrick. Moreover, when the wind speed is more than 20 m/s, the back wind load mainly affects the minimum reliability index of the derrick. This study provides a thorough explanation of the strength distribution law and the reliability of derricks under complex loads.

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Section: Reliability Modeling Under Complex Loadmentioning

confidence: 99%

Influence of Complex Load on the Strength and Reliability of Offshore Derrick by Using APDL and Python

et al. 2022

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“…Failure of all elements included in the MCSE leads to transformation of the safe structural system into a mechanism -a system of incomplete fixity. To determine the reliability model, spectral analysis (Kłosowska et al, 2017;Mochocki et al, 2018b) of the linear stiffness matrix was used…”

Section: Reliability Modelmentioning

confidence: 99%

Impact of the wind load probability distribution and connection types on the reliability index of truss towers

Mochocki¹,

Obara²,

Radoń³

2020

Journal of Theoretical and Applied Mechanics

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The paper concerns the analysis of reliability of three truss towers performed with the system approach. The first stage of the reliability analysis involved determination of the reliability index for trusses while assuming the same reliability of elements. In the second stage, assessment of the reliability was made according to Eurocodes. The impact of the wind load probability distribution and connection types in towers on their reliability was analysed. In the capacity function, the following random variables were taken into account: cross-sectional area, yield strength, modulus of elasticity, minimum moment of inertia, and length of the element.

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Influence of Truss Topology on Reliability Index

Cited by 2 publications

References 6 publications

Influence of Complex Load on the Strength and Reliability of Offshore Derrick by Using APDL and Python

Influence of Complex Load on the Strength and Reliability of Offshore Derrick by Using APDL and Python

Impact of the wind load probability distribution and connection types on the reliability index of truss towers

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